DCI-Based SRS Triggering and TCI State Updates With Lower Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing signaling overhead, particularly in triggering aperiodic SRS transmissions and updating TCI states, which can lead to inefficiencies in channel measurements and resource utilization.
Innovation Solution
A novel approach using enhanced DCI formats, such as DCI format X, with CRC scrambled by TCI-SRS-RNTI or SRS-TCI-RNTI, to reduce signaling overhead by up to 35% by optimizing the configuration and triggering of aperiodic SRS transmissions and TCI states, allowing for more efficient power control and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional DCI formats are used to trigger aperiodic SRS transmissions and update TCI states, then the system maintains compatibility with existing protocols, but signaling overhead increases and resource utilization efficiency decreases
Solution Approach 1:
The patent combines multiple functions into a single DCI format X: triggering aperiodic SRS transmissions, updating TCI states, and conveying power control adjustments are all performed through one unified DCI message rather than separate signaling procedures. This merging reduces the total number of DCI messages required and decreases signaling overhead while improving resource utilization efficiency.
Solution Approach 2:
DCI format X is designed as a universal format that can simultaneously perform multiple functions: it can trigger aperiodic SRS on one or more component carriers, update TCI states for downlink receptions, and provide power control commands. This multi-functionality allows a single DCI format to replace what previously required multiple different DCI formats and signaling procedures.
2Ease of manufacture
If separate DCI messages are used for triggering SRS and updating TCI states, then protocol implementation is simpler, but signaling overhead increases by up to 35%
Solution Approach 1:
The patent merges separate DCI messages for SRS triggering and TCI state updates into a single DCI format X. This combination reduces signaling overhead by eliminating redundant message structures and overhead fields that would exist in multiple separate messages, while the unified format maintains clear functional separation through dedicated fields for each purpose.
3Adaptability or versatility
If multiple DCI formats are used for different SRS triggering scenarios, then specific transmission requirements can be precisely controlled, but device complexity and signaling overhead increase
Solution Approach 1:
DCI format X serves as a universal format that can handle multiple SRS triggering scenarios through configurable parameters. The format includes fields that can be configured to support different component carrier combinations, different SRS resource sets, and different power control adjustments, all within a single unified structure rather than requiring multiple specialized formats.
Solution Approach 2:
The patent introduces dynamic configurability within DCI format X, where parameters such as component carrier indicators, SRS resource set indicators, and power control adjustments can be dynamically set based on the specific transmission scenario. This dynamic approach allows the same format structure to adapt to various requirements without increasing fundamental format complexity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Presented are systems and methods for signal transmission. A wireless communication device may receive downlink control information (DCI) from the wireless communication node. The DCI may comprise a plurality of blocks, each one or more blocks of the plurality of blocks for a respective wireless communication device. The wireless communication device may receive the DCI to trigger an aperiodic sounding reference signal (SRS). The wireless communication device may receive a configuration from the wireless communication node via higher layer signaling. The wireless communication device may receive the configuration to configure parameter srs-TPC-PDCCH-Group as typeA, typeB, typeC or typeD.